declare namespace User {
  interface UserInfo {
    name: string;
    age: number;
  }
  export type listRes = User2.UserInfo[];
}
declare namespace User2 {
  interface UserInfo {
    name: string;
    age: number;
  }
  export type listRes = User.UserInfo[];
}

interface String {
  format(...args: any[]): string;
}
